Mini Photoelectric Spectrometer for photoelectric properties examination

Description

Mini Photoelectric Spectrometer setup allows to apply various measurement techniques: chronoamperometry, voltammetry, cyclic voltammetry and the light intensity modulated photocurrent/photovoltage. Those techniques enables to examine the photoelectric dynamics of the sample. Samples may be investigated using two- or three-electrodes configuration.

Quantities measured by the instrument:

I-V characteristics of a sample under illumination,
Open Circuit Potential (OCP) as a function of light wavelength,
Photocurrent as a function of light intensity,
IPCE or EQE at wavelengths provided by the LED Revolver,
Surface Photovoltage (SPV),
Space Charge Region capacitance if a super-bandgap wavelength LED is present in the LED Revolver.
Measurement techniques:
Chronoamperometry,
Voltammetry,
Cyclic voltammetry,
Chopped illuminance and more

Specifications

LED Revolver

10 LED slots,
Default LED set: 365 nm, 385 nm, 405 nm, 450 nm, 520 nm, 590 nm, 630 nm, 740 nm, 840 nm, white (3000 K),
Custom LED selection available,
Typical electric power of LEDs: 3W,
Light intensity modulation: square, sinusoidal, triangle or ramp waveform with adjustable amplitude and bias light intensity,
Light modulation frequency range: 1 µHz ÷ 10 kHz,

Potentiostat

Bias potential range: -5 V ÷ 5 V,
Current ranges: 10 nA, 100 nA, 1 µA, 10 µA, 100 µA, 1 mA, 10 mA,
Current resolution: from 1 pA to 100 nA (range dependent),

Controller

Maximum sampling rate: 1 kSample/s,
Connection with PC: via USB 2.0,

Electrochemical cuvette

Adapted for transparent and opaque samples,
Sample may be illuminated through the electrolyte or through the rear optical window,
PTFE container for electrolyte,
Reference electrode: Ag/AgCl,
Counter electrode: Pt.
The instrument may be extended with the Sample Chamber to screen the ambient light and electromagnetic fields.